数字调制信号自动识别及解调技术研究  

Research on automatic classification of digital modulation and demodulation technology

作　　者：荣鑫[1] 姚金杰[1] 苏新彦[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室

出　　处：《传感器世界》2010年第12期28-30,共3页Sensor World

基　　金：山西省研究生优秀创新项目(编号:20093079);电子测试技术国防科技重点实验室基金项目(编号:9140C1204051010)

摘　　要：本文以软件无线电中数字调制解调算法为理论依据,分析提取了用于自动识别的基于参数统计的特征参数,提出利用信号包络的方差与均值平方之比和微分后信号的包络参数来实现调制方式识别。在高斯白噪声信道条件下,建立了基于LabVIEW平台的模型,可以更好的实现多种数字调制信号的自动识别,而且在较低信噪比情况下达到很高的识别效率。According to the digital modulation-demodulation theory in software defined radio（SDR） technology , the statistical characteristic parameters for automatic classification are analyzed and picked up in this paper. Some parameters are used to realize the automatic modulation-mode identification , which include the ratio of magnitude variance to the square of magnitude mean of signal envelope , and the parameters of signal-differentiated envelope. Under the condition of Guss white noise channel, a model is built based on the software platform LabVIEW8.6. , which can complete the automatic classification of multi-signal digital modulation much better, and can get high classification efficiency under low signal to noise ratio（SNR）

关 键 词：软件无线电 数字调制 自动识别 

分 类 号：TN911.3[电子电信—通信与信息系统]